Calculate Net Profit, ROI, and Margins for FBA Sellers
Total Amazon Fees:$0.00
Total Expenses:$0.00
Net Profit:$0.00
Net Margin:0%
Return on Investment (ROI):0%
How to Use the Amazon FBA Profit Calculator
Success on Amazon depends heavily on understanding your numbers. This Amazon FBA Profit Calculator helps you break down the hidden costs of selling on the platform. To get started, enter your target Selling Price and the Cost of Goods Sold (COGS). Don't forget to include the shipping costs to send your inventory to Amazon's fulfillment centers.
Key Components of FBA Profitability
1. Referral Fees: Amazon typically charges a percentage of the total sales price (usually 15%) as a commission for using their marketplace.
2. Fulfillment (Pick & Pack) Fees: This is the cost Amazon charges to store, pick, pack, and ship your product to the customer. This fee varies based on the size and weight of your item.
3. Marketing & PPC: Many sellers overlook the cost of advertising. If you spend $300 to get 100 sales, your PPC cost per unit is $3.00. This must be factored into your net profit.
Example Calculation
Imagine you sell a yoga mat for $50.00. Your cost to manufacture and ship it to Amazon is $15.00.
Referral Fee (15%): $7.50
FBA Fulfillment Fee: $6.00
PPC Advertising: $4.00
Total Expenses: $32.50 ($15 + $7.50 + $6 + $4)
Net Profit: $17.50
Net Margin: 35%
Knowing these metrics allows you to decide if a product is worth sourcing or if you need to optimize your supply chain.
Why Net Margin and ROI Matter
While Net Profit tells you how much cash you keep per sale, Net Margin tells you the efficiency of your business. ROI (Return on Investment) is even more critical for scaling—it shows you how hard your capital is working. A 100% ROI means for every $1 you spend on stock, you get $1 of profit back.
function calculateFBAProfit() {
var price = parseFloat(document.getElementById('fba_price').value) || 0;
var cost = parseFloat(document.getElementById('fba_cost').value) || 0;
var shipping = parseFloat(document.getElementById('fba_shipping').value) || 0;
var referralPct = parseFloat(document.getElementById('fba_referral').value) || 0;
var pickPack = parseFloat(document.getElementById('fba_pickpack').value) || 0;
var marketing = parseFloat(document.getElementById('fba_marketing').value) || 0;
if (price 0) ? (netProfit / cost) * 100 : 0;
// Display Results
document.getElementById('res_fees').innerText = "$" + totalAmazonFees.toFixed(2);
document.getElementById('res_total_exp').innerText = "$" + totalExpenses.toFixed(2);
var profitEl = document.getElementById('res_profit');
profitEl.innerText = "$" + netProfit.toFixed(2);
if (netProfit >= 0) {
profitEl.className = "result-value profit-positive";
} else {
profitEl.className = "result-value profit-negative";
}
document.getElementById('res_margin').innerText = netMargin.toFixed(2) + "%";
document.getElementById('res_roi').innerText = roi.toFixed(2) + "%";
// Show result area
document.getElementById('fba-result-area').style.display = "block";
// Scroll to results on mobile
if (window.innerWidth < 600) {
document.getElementById('fba-result-area').scrollIntoView({ behavior: 'smooth' });
}
}